INSTANTANEOUS PHOTOGEAPHY. 



21 



of photographs during the three mouths spent in his final inves- 

 tigations. 



Fio. 7. 



1 



In outward appearance each of these portable batteries (Fig. 8) 

 resembles a rectangular box about eighteen inches square on the 

 ends and four feet long, the back and front being open, and the 

 latter divided by vertical partitions into fifteen spaces, twelve of 

 which are equal. In each of the equal spaces is a releasing 

 magnet and an exposor exactly similar in construction and opera- 

 tion to the one described above, but only one-fourth as large. 



Back of the partitions, and resting upon battens fastened to the 

 side of the box (Fig. 9), containing thirteen cameras in one, for, 

 though each of the thirteen lenses projecting from the front comes 

 from a separate chamber, in construction there is really but one 

 long bellows ingeniously subdivided into thirteen parts. Twelve 

 of the lenses pass into hoods directly back of the double open- 

 ings in the exposors ; the thirteenth opens into one of the extra 



